Well, I just finished 3 games last week, Halo 4, Assassin's Creed 3 and Black ops 2
So here's some things I like about them
AC3: still open world like the other games but, new gameplay. They also tweaked the navigation system, which is cool, the seasons change, thick snow is really annoying for some parts.
BO2: non-linear (except for the beginning missions) are great, you can also change your loadout before the mission starts. Nice graphics, characters has facial expressions, andthe one you are playing now talks. Multiplayer and zombies are cool, AI bots for multiplayer is okay.
Halo 4: same gameplay but controls changed a bit, pressing the L stick can make Master Chief sprint, and pressing B toggles crouch or stamd, like CoD. o
Outstanding graphics, it might win the "Best graphics" award (if there are any). New infections mode called flood mode, where infected individuals now takesthe form of a flood, they do not use the energy swords but a flood claw.
New power ups.
Please take note this is for Xbox 360.